Stanford Torus Space Settlement

The Stanford Torus was the principal design considered by the 1975 NASA
Summer Study, which was conducted in conjunction with Stanford University
(and published as Space Settlements: A Design Study, NASA Publication SP-413). It consists of a torus or donut-shaped ring that is one mile in diameter, rotates once per minute to provide Earth-normal gravity on the inside of the outer ring, and which can house 10,000 people.

NSS is an independent nonprofit nonpartisan educational membership organization dedicated to the creation of a spacefaring civilization. Our vision: People living and working in thriving communities beyond the Earth, and using the vast resources of space for the dramatic betterment of humanity.